Zartan of the jungle crosses a river by grabbing on an 8m long vine, conveniently hanging from a strong branch and then swinging over the water knowing zartan has a mass of 85 kg and achieves a speed of 4 m/s at the lowest point of the arc of the swing find his acceleration and the tension in the vine.

During which interval are the persons represented by the graph not moving? a) 0 to 0.5 hrs b) 1.5 to 2 hrs c) 2 to 2.5 hrs d) 4.5 to 5 hrs

In science and physics what is the standard unit of measure for speed?

Engineers find a new metal that is stronger than steel but much lighter. this material is also significantly cheaper than what is currently used for most aircraft, available in large quantities, and easy to manufacture. the engineers are excited because this new material will lower the costs of buying and operating airplanes for companies. what is probably the best step for the engineers to make next?